package com.eding.service;import com.eding.dto.ShoppingCartDTO;import com.eding.entity.ShoppingCart;import java.util.List;public interface ShoppingCartService {    /**     * 用户端添加购物车接口     * @param shoppingCartDTO     */    void addShoppingCart(ShoppingCartDTO shoppingCartDTO);    /**     * 用户端查询购物车接口     * @return     */    List<ShoppingCart> getShoppingCartList();    /**     * 清空购物车     */    void cleanShoppingCart();    /**     * 用户端减少购物车商品接口     * @param shoppingCartDTO     */    void subShoppingCart(ShoppingCartDTO shoppingCartDTO);}